Intermec EasyCoder 501 - Circuit Diagram

175Intermec EasyCoder 501 – Service Manual Ed. 7
Chapter 22 Parallel Interface Board
Parallel Interface Board 1-971704-41
22.5 Circuit Diagram
1
/STROBE
2
74AC00
4
5
74AC00
C9
3STROBE'
2
+5V
1CLRBUSY
15
14
R1
74HC423
+5V
S3
6
&
STROBE
S2IC8B
3
&
IC8A
74HC74
10
S 9 STROBE'
12
1D
11
>
C1
8
+5V
13
R
IC5B
C
R/C
13 /ACK
&
4
R
IC6A
74HC374
STROBE 11
CLK
RDDATA 1
OE
D7 13
D6 8
D5 14
D4 7
D3 17
D2 4
D1 18
D0 3
+5.3V
+5V
D1
C10 C4C3C2C1 C5 C6 C7
11
10
C8
9
7
6
74HC423
C
R/C
5
&
12
R
IC6B
/ACK
IC1
AD7D
AD02
AD6D
AD119
AD5D
AD25
AD4D
AD316
AD3D
AD46
AD2D
AD515
AD1D
AD69
AD0D
AD712
WRSTAT
S1
R2
IC5A
R
1/RESET
6
C1
>
3
1D
2
5S
4
74HC74
DREADY
IC8D
12
&
11
13
+5V
74AC00
+5V
1
2 3
/STROBE
74AC374
11
CLK
1
OE
3 2 PE
D
18 19 /ERROR
D
4 5 ST1
D
17 16 ST2
D
7 6 ST3
D
14 15 SELECT
D
8 9
D
13 12 TESTID
D
IC2
BUSY
IC8C
9
&
8 ACK
10
74AC00
/SLCTIN
/INPRM
9745638
RN41
+5V
10987654
RN3
BUSY
F1
F2
F3
F4
F5
F6
F7
F8
F9
F10
F11
F12
F13
10 2
F14
F15
F16
F17
F18
+5V R3
F19
F20
GNDC CONNECTED TO CHASSIS GROUND
( MOUNTING HOLES ON CONTACT )
P2+5V
P1
1
19
2
20
3
21
4
22
5
23
6
24
7
25
8
26
9
27
16
28
P1
29
30
34
12
32
14
15
33
13
11
10
35
18
31
36
17
P1
37
38
ADBUS
GNDI26
-12V25
A124
+12V23
A322
A221
A420
/RESET19
GND18
+5.3V17
NMIHPC16
X115
X014
RD13
WR12
XINT11
CSX110
CSX09
AD08
AD77
AD16
AD65
AD24
AD53
AD32
AD41
P4
+5V
1
+5V
1
74HC367B
POLL 15
EN
12
14
IC7B
74HC367A
POLL 1
EN
/SLCTIN 10
/INPRM 6
TESTID 4
DREADY 2
IC7A
AD03
A4
AD15
CSX0
AD27
RD
AD39
A3
A2
A1
AD413
AD511
A4
CSX0
WR
10
AD79
A3
AD68
A2
AD57
A1
AD46
AD35
AD24
AD13
AD02
RN2
A12
A23
A34
A45
9
10
RD6
WR7
CSX08
RN1
74HC138
DX
1 15 WRSTAT
0 0
2 0 14 CLRBUSY
1 G 1
7
3 13
2 2
12
3
4 11
4
&
5 10
5
6 9
6
7
7
IC3
74HC138
DX
1 15 RDDATA
0 0
2 0 14 POLL
1 G 1
7
3 13
2 2
12
3
4 11
4
&
5 10
5
6 9
6
7
7
IC4